Lee Sexton and his band perform “Whoa Mule” in a music video by Herb E. Smith of Appalshop. Lee and the late fiddler Marion Sumner are a couple of the musicians whose homes are near Route 7 in Letcher County, Kentucky. The state promotes U.S. 23 as its “Country Music Highway,” but it’s roads like Route 7 that carry the best of the region’s cultural heritage.